program math_block
implicit none
integer(8) A,i,l,m,n
real(8),allocatable :: x(:)
read(*,*) l
read(*,*) n
allocate (x(n))
read(*,*) (x(m),m=1,n)
call mat(x,n)
A=0
do i=1,n
   A=A+x(i)
   if (A>l) exit
end do
write(*,*) (i-1)
end program

subroutine mat(x,n)
integer(8) n,j,i,t
real(8),dimension(n) ::x
  do i=1,n-1
     do j=i+1,n
        if(x(i) > x(j))then
           t=x(i)
           x(i)=x(j)
           x(j)=t
        end if
     end do
  end do
end subroutine